:root{
  --primary:#3b5bff;
  --primary-2:#7b3cff;
  --accent:#00d1c1;
  --accent-2:#ff7a45;
  --ink:#12152b;
  --ink-2:#3d4261;
  --muted:#6b7191;
  --line:#e7e9f4;
  --bg:#f6f7fd;
  --white:#fff;
  --grad:linear-gradient(120deg,#3b5bff 0%,#7b3cff 50%,#00c8d7 100%);
  --grad-soft:linear-gradient(135deg,#eef1ff 0%,#f4efff 50%,#e9fbfa 100%);
  --radius:18px;
  --shadow:0 12px 34px rgba(38,48,104,.09);
  --shadow-hover:0 22px 48px rgba(52,64,140,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--white);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .25s}
ul{list-style:none}
.container{width:min(1200px,92%);margin:0 auto}
section{scroll-margin-top:84px}
h1,h2,h3,h4{line-height:1.3;font-weight:800;letter-spacing:.2px}
h2.section-title{font-size:clamp(24px,3vw,36px);text-align:center;color:var(--ink)}
.section-sub{text-align:center;color:var(--muted);max-width:760px;margin:14px auto 0;font-size:15.5px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--primary);background:#eef1ff;padding:6px 16px;border-radius:30px;margin-bottom:16px}
.center{text-align:center}
.pad{padding:78px 0}
.bg-soft{background:var(--bg)}
.bg-grad-soft{background:var(--grad-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 30px;border-radius:40px;font-weight:700;font-size:15.5px;cursor:pointer;border:none;transition:transform .25s,box-shadow .25s,background .25s;font-family:inherit}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(59,91,255,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(59,91,255,.42)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid #d6dcff}
.btn-ghost:hover{background:#f2f4ff;transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--ink);box-shadow:0 8px 20px rgba(20,25,60,.14)}
.btn:active{transform:scale(.97)}

/* NAV */
header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink)}
.brand img{height:38px;width:auto}
.nav-links{display:flex;align-items:center;gap:0}
.nav-links a{padding:8px 12px;font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:8px;transition:.25s}
.nav-links a:hover{color:var(--primary);background:#f0f3ff}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-cta .btn{padding:10px 22px;font-size:14px}
.menu-toggle{display:none;background:none;border:none;font-size:26px;color:var(--ink);cursor:pointer;line-height:1}

/* HERO */
.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 12% 18%,#2a2f6e 0%,#1a1e46 45%,#0f1230 100%);color:#fff;padding:96px 0 110px}
.hero::before{content:"";position:absolute;width:620px;height:620px;border-radius:50%;background:radial-gradient(circle,rgba(90,120,255,.5),transparent 68%);top:-220px;right:-160px;filter:blur(10px)}
.hero::after{content:"";position:absolute;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(0,209,193,.38),transparent 68%);bottom:-200px;left:-120px}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:7px 16px;border-radius:30px;font-size:13.5px;font-weight:600;letter-spacing:.5px;margin-bottom:22px}
.hero-tag .dot{width:8px;height:8px;border-radius:50%;background:#25f2c8;box-shadow:0 0 10px #25f2c8;animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.22;margin-bottom:22px;background:linear-gradient(100deg,#fff 20%,#a8c4ff 60%,#7ef2e0 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:17px;color:#c3c9ee;max-width:560px;margin-bottom:32px}
.hero-btns{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:38px}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px}
.hero-stats .item strong{display:block;font-size:28px;color:#fff;font-weight:800}
.hero-stats .item span{font-size:13.5px;color:#a9b0dc}
/* hero visual card - no image */
.hero-visual{position:relative}
.glass-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:26px;backdrop-filter:blur(10px);box-shadow:0 30px 60px rgba(0,0,0,.3)}
.glass-card h4{font-size:15px;color:#dbe0ff;margin-bottom:18px;font-weight:700;letter-spacing:1px}
.model-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.14);font-size:14px}
.model-row:last-child{border-bottom:none}
.model-row span{color:#b9c0ea}
.model-row b{color:#fff;font-weight:700}
.bar{height:8px;border-radius:6px;background:rgba(255,255,255,.14);overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;border-radius:6px;background:var(--grad);animation:grow 1.6s ease}
@keyframes grow{from{width:0}}
.floating-chip{position:absolute;background:#fff;color:var(--ink);padding:9px 16px;border-radius:30px;font-size:13px;font-weight:700;box-shadow:0 12px 26px rgba(0,0,0,.25)}
.chip1{top:-16px;right:20px;animation:float1 4s ease-in-out infinite}
.chip2{bottom:-14px;left:-10px;animation:float1 5s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.on{opacity:1;transform:none}

/* cards grid */
.grid{display:grid;gap:24px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:transform .3s,box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:#d6dcff}
.card .ico{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;background:var(--grad-soft);margin-bottom:16px;color:var(--primary);font-weight:800}
.card h3{font-size:18px;margin-bottom:10px}
.card p{font-size:14.5px;color:var(--muted)}
.card .tagline{display:inline-block;margin-top:14px;font-size:12.5px;font-weight:700;color:var(--primary);background:#eef1ff;padding:4px 12px;border-radius:20px}

/* stats strip */
.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;background:#fff;border-radius:24px;padding:38px;box-shadow:var(--shadow);margin-top:-56px;position:relative;z-index:5}
.stats-strip .item{text-align:center}
.stats-strip strong{font-size:clamp(24px,3vw,38px);background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block;font-weight:800}
.stats-strip span{font-size:14px;color:var(--muted);font-weight:600}

/* scenario list */
.scn-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scn{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;transition:.3s;position:relative;overflow:hidden}
.scn::after{content:"";position:absolute;inset:0;background:var(--grad);opacity:0;transition:.35s;z-index:0}
.scn:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.scn:hover::after{opacity:.035}
.scn h4{font-size:16px;margin-bottom:8px;position:relative;z-index:1;display:flex;align-items:center;gap:8px}
.scn h4 i{width:28px;height:28px;border-radius:8px;background:var(--grad-soft);color:var(--primary);font-size:13px;font-style:normal;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.scn p{font-size:13.5px;color:var(--muted);position:relative;z-index:1}

/* models marquee */
.tagcloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:1000px;margin:30px auto 0}
.tagcloud span{padding:8px 18px;border-radius:30px;background:#fff;border:1px solid var(--line);font-size:13.5px;font-weight:600;color:var(--ink-2);transition:.25s;cursor:default}
.tagcloud span:hover{background:var(--grad);color:#fff;border-color:transparent;transform:translateY(-3px)}

/* process */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.step{background:#fff;border-radius:var(--radius);padding:28px 22px;border:1px solid var(--line);transition:.3s;position:relative}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.step .num{font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:10px;line-height:1}
.step h4{font-size:16.5px;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted)}

/* table */
.table-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;background:#fff;min-width:720px}
th,td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
thead th{background:linear-gradient(120deg,#3b5bff,#7b3cff);color:#fff;font-weight:700;font-size:14.5px}
tbody tr:hover{background:#f8f9ff}
td.good{color:#0a9c6b;font-weight:700}
td.mid{color:#c07a11}

/* review score */
.review-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:40px;align-items:center;background:linear-gradient(135deg,#fff,#f4f6ff);border:1px solid var(--line);border-radius:24px;padding:44px;box-shadow:var(--shadow)}
.score-box{text-align:center}
.score-box .big{font-size:72px;font-weight:800;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.score-box .stars{color:#ffb400;font-size:26px;letter-spacing:4px;margin:10px 0 6px}
.score-box .stars span{color:#e3e6f3}
.score-box p{color:var(--muted);font-size:14px}
.feature-list li{display:flex;align-items:flex-start;gap:12px;padding:9px 0;font-size:15px;color:var(--ink-2);border-bottom:1px dashed var(--line)}
.feature-list li:last-child{border-bottom:none}
.feature-list li b{color:var(--ink)}
.feature-list .ok{color:#0a9c6b;font-weight:800;flex-shrink:0}

/* comments */
.comment{padding:26px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);transition:.3s;display:flex;flex-direction:column;gap:14px}
.comment:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.comment .stars{color:#ffb400;font-size:14px;letter-spacing:2px}
.comment p{font-size:14.5px;color:var(--ink-2);flex:1}
.comment .who{display:flex;align-items:center;gap:12px}
.comment .avatar{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.comment .who b{display:block;font-size:14.5px}
.comment .who span{font-size:12.5px;color:var(--muted)}

/* case */
.case-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:.3s}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.case-card img{width:100%;height:200px;object-fit:cover}
.case-card .body{padding:22px}
.case-card h4{font-size:17px;margin-bottom:8px}
.case-card p{font-size:13.5px;color:var(--muted)}

/* articles */
.article{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;transition:.3s}
.article:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6dcff}
.article .date{flex-shrink:0;width:64px;height:64px;border-radius:14px;background:var(--grad-soft);display:flex;flex-direction:column;align-items:center;justify-content:center;font-weight:800;color:var(--primary)}
.article .date b{font-size:20px;line-height:1}
.article .date span{font-size:11px}
.article h4{font-size:15.5px;margin-bottom:6px}
.article p{font-size:13.5px;color:var(--muted)}

/* pricing / token */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px;text-align:center;transition:.3s;position:relative}
.price-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.price-card.pop{border:2px solid var(--primary);box-shadow:0 18px 40px rgba(59,91,255,.2)}
.price-card.pop::before{content:"推荐";position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:4px 18px;border-radius:20px}
.price-card h4{font-size:17px;margin-bottom:8px}
.price-card .amount{font-size:40px;font-weight:800;color:var(--ink);margin:12px 0 4px}
.price-card .amount small{font-size:14px;color:var(--muted);font-weight:600}
.price-card ul{margin:20px 0;text-align:left}
.price-card ul li{font-size:14px;color:var(--ink-2);padding:7px 0;padding-left:24px;position:relative}
.price-card ul li::before{content:"✓";position:absolute;left:0;color:#0a9c6b;font-weight:800}

/* network */
.network{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.net-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;text-align:center;transition:.3s}
.net-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.net-card .dot{width:46px;height:46px;border-radius:50%;background:var(--grad);margin:0 auto 14px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px}
.net-card h4{font-size:15.5px;margin-bottom:6px}
.net-card p{font-size:13px;color:var(--muted)}

/* timeline */
.timeline{position:relative;max-width:820px;margin:0 auto;padding-left:34px}
.timeline::before{content:"";position:absolute;left:10px;top:6px;bottom:6px;width:3px;background:linear-gradient(#3b5bff,#7b3cff,#00d1c1);border-radius:3px}
.tl-item{position:relative;margin-bottom:30px}
.tl-item::before{content:"";position:absolute;left:-31px;top:4px;width:16px;height:16px;border-radius:50%;background:#fff;border:4px solid var(--primary)}
.tl-item h4{font-size:16.5px;margin-bottom:6px}
.tl-item p{font-size:14px;color:var(--muted)}

/* form */
.form-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:start}
form{background:#fff;border:1px solid var(--line);border-radius:24px;padding:36px;box-shadow:var(--shadow)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.f-group{margin-bottom:18px}
.f-group label{display:block;font-size:14px;font-weight:700;margin-bottom:7px;color:var(--ink-2)}
.f-group label .req{color:#ff5a5a}
input,select,textarea{width:100%;padding:12px 15px;border:1.5px solid var(--line);border-radius:11px;font-size:14.5px;font-family:inherit;color:var(--ink);background:#fafbff;transition:.25s;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(59,91,255,.1)}
textarea{resize:vertical;min-height:110px}
.btn-submit{width:100%;margin-top:6px}
.contact-info .item{display:flex;gap:14px;margin-bottom:22px}
.contact-info .item .ic{width:44px;height:44px;border-radius:12px;background:var(--grad-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0}
.contact-info h4{font-size:15px;margin-bottom:3px}
.contact-info p{font-size:14px;color:var(--muted);word-break:break-all}
.qr{margin-top:6px}
.qr img{width:140px;border-radius:12px;border:1px solid var(--line)}

/* faq */
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;background:#fff;overflow:hidden;transition:.3s}
.faq-item:hover{border-color:#d6dcff}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:16px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;align-items:center;gap:16px;cursor:pointer;font-family:inherit}
.faq-q .plus{font-size:22px;color:var(--primary);transition:transform .3s;flex-shrink:0;font-weight:400}
.faq-item.open .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;color:var(--muted);font-size:14.5px}
.faq-a p{padding:0 24px 22px}

/* join / partner */
.join-box{background:linear-gradient(120deg,#20264f,#2b2f6b 55%,#1c2a55);border-radius:26px;padding:56px;color:#fff;display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;position:relative;overflow:hidden}
.join-box::after{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(0,209,193,.4),transparent 70%);top:-120px;right:-80px}
.join-box h2{font-size:clamp(24px,3vw,34px);margin-bottom:16px;position:relative;z-index:1}
.join-box p{color:#c3c9ee;font-size:15.5px;margin-bottom:24px;position:relative;z-index:1}
.join-box ul{position:relative;z-index:1}
.join-box ul li{padding:6px 0;padding-left:26px;position:relative;color:#dde2ff;font-size:14.5px}
.join-box ul li::before{content:"◆";position:absolute;left:0;color:#25f2c8;font-size:12px;top:9px}
.join-box .btn{position:relative;z-index:1}

/* footer */
footer{background:#0d1026;color:#a9b0cc;padding:64px 0 0;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
footer h4{color:#fff;font-size:15.5px;margin-bottom:18px;font-weight:700}
footer a{color:#a9b0cc;font-size:14px;display:block;padding:5px 0;transition:.25s}
footer a:hover{color:#7ef2e0;padding-left:4px}
.foot-brand img{height:40px;width:auto;margin-bottom:16px;filter:brightness(0) invert(1)}
.foot-brand p{font-size:13.5px;line-height:1.8;max-width:300px}
.foot-bottom{padding:22px 0;text-align:center;font-size:13px;color:#6a7196}

/* float */
.back-top{position:fixed;right:26px;bottom:150px;width:46px;height:46px;border-radius:50%;background:#fff;box-shadow:0 8px 22px rgba(20,25,60,.18);display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:.3s;z-index:800;border:none;font-size:18px;color:var(--primary)}
.back-top.show{opacity:1;visibility:visible}
.back-top:hover{transform:translateY(-4px)}
.float-kf{position:fixed;right:26px;bottom:74px;z-index:800}
.float-kf .btn-kf{width:56px;height:56px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;border:none;cursor:pointer;box-shadow:0 12px 28px rgba(59,91,255,.4);font-size:22px;transition:.3s}
.float-kf .btn-kf:hover{transform:scale(1.08)}
.kf-panel{position:absolute;right:0;bottom:70px;width:250px;background:#fff;border-radius:18px;box-shadow:0 20px 50px rgba(20,25,60,.25);padding:20px;text-align:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s}
.kf-panel.show{opacity:1;visibility:visible;transform:none}
.kf-panel img{width:150px;margin:0 auto 10px;border-radius:12px}
.kf-panel p{font-size:13.5px;color:var(--muted)}
.kf-panel b{display:block;font-size:14.5px;color:var(--ink);margin-bottom:4px}

/* responsive */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-visual{max-width:520px}
  .g4,.stats-strip,.steps,.network,.price-grid{grid-template-columns:repeat(2,1fr)}
  .scn-grid{grid-template-columns:repeat(2,1fr)}
  .review-panel,.form-wrap,.join-box{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:860px){
  .nav-links{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 6%;gap:0;box-shadow:0 16px 30px rgba(20,25,60,.12);transform:translateY(-150%);transition:.35s;max-height:calc(100vh - 72px);overflow-y:auto}
  .nav-links.open{transform:none}
  .nav-links a{padding:13px 10px;border-radius:10px;border-bottom:1px solid #f1f2fa}
  .nav-links a:last-child{border-bottom:none}
  .menu-toggle{display:block}
  .nav-cta .btn{display:none}
}
@media(max-width:640px){
  .pad{padding:56px 0}
  .hero{padding:64px 0 90px}
  .g2,.g3,.g4,.scn-grid,.steps,.network,.price-grid{grid-template-columns:1fr}
  .f-row{grid-template-columns:1fr}
  .stats-strip{grid-template-columns:1fr 1fr;padding:26px;gap:18px}
  .hero-stats{gap:22px}
  .review-panel{padding:28px}
  .score-box .big{font-size:56px}
  form{padding:24px}
  .join-box{padding:32px}
  .foot-grid{grid-template-columns:1fr}
  .table-wrap{box-shadow:none}
  .article{flex-direction:row}
}